[Effect of growth media additives. Air capacity and drainage behaviour]

air du sol aire del suelo bodenkunde coir contenido de agua en el suelo fibra del coco fibras vegetales fibre de coco fibre vegetale gartenbau growing media kokosfaser laine de roche lana mineral peat plant fibres rockwool sistema poroso del suelo soil air soil pore system soil water content steinwolle substrat substrat de culture substratos de cultivo teneur en eau du sol torf tourbe turba water holding capacity